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13 June 2022, 11:31:42 UTC
Revision 3508e6590d4729ac07f01f7ae2256c2f9dc738b8 authored by Mike Snitzer on 29 July 2015, 18:11:28 UTC, committed by Mike Snitzer on 29 July 2015, 18:32:08 UTC 
Revert "dm cache: do not wake_worker() in free_migration()"
 
This reverts commit 386cb7cdeeef97e0bf082a8d6bbfc07a2ccce07b.

Taking the wake_worker() out of free_migration() will slow writeback
dramatically, and hence adaptability.

Say we have 10k blocks that need writing back, but are only able to
issue 5 concurrently due to the migration bandwidth: it's imperative
that we wake_worker() immediately after migration completion; waiting
for the next 1 second wake up (via do_waker) means it'll take a long
time to write that all back.

Reported-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
1 parent 6ed443c
History
Tip revision: 3508e6590d4729ac07f01f7ae2256c2f9dc738b8 authored by Mike Snitzer on 29 July 2015, 18:11:28 UTC
Revert "dm cache: do not wake_worker() in free_migration()"
Tip revision: 3508e65
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